Stadtbahn via Treptower Park, as they still do. In addition a connecting line also runs from Baumschulenweg to the southern part of the Ringbahn via Köllnische Heide. Both suburban lines were converted to electric operation in 1929 and became part of the S-Bahn on its foundation shortly later. References Railway lines in Brandenburg Railway lines in Berlin Railway lines in Saxony Standard gauge railways in Germany Railway lines opened in 1866 1866 establishments in Prussia Buildings and structures in Treptow-Köpenick Buildings and structures in Dahme-Spreewald Buildings and structures in Spree-Neiße Buildings and structures in Cottbus Buildings and structures in Görlitz (district) Buildings and structures in Görlitz Berlin S-Bahn